Improvement in belay-magnets



0 DURANT. ELECTROMAGNETIC RELAY MACHINE.

Patented May 19,1868.

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I CHARLES DURAN'I, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO GEORGE F.DURANT, OF SAME PLACE.

Letters Patent No. 78,076, dated May 19, 1868.

IMPROVEMENT IN RELAY-MAGNETS.

TO ALL WHOM IT MAY CONCERN Be it known that I, Omlnnns Dunsn'r, ofJersey City, in the county of Hudson, and State of New Jersey, haveinvented a new and useful Improvement in the Electro-MagneticRelay-Machine used in operating the electromagnetic telegraph and I dohereby declare that the following is a full, clear, and exactdesciiption of the construction and operation of the same, referencebeing had to the accompanying drawings. and to the letters of referencemarked thereon, making a part of this specification. I

My invention consists, first, in so placing the armature orarmature-lever pressing against one or both cores of the magnet, oragainst any unyielding substance as a fulcrum, that the elasticity aloneof the extended armature or armaturedever shall constitute an efficientand the only spring required in recoil on opening or breaking thecircuit; second, in constructing the extended armature or armature-leverwith a'flexible joint, by

which means the platina point now used to open and close the localcircuit may be restrained to move and operate over any space, howeversmall, while. the armature itself or armature-lever, below the joint, isfree to move ever greater or less space incident to varying strong andfeeble electric currents; and third, in dispensing with thefixed platinapoint used foropcning and closing the local circuit, and nowfirmiy'fastened to the extended armature or armature-lever, andsubstituting therefor a shifting or sliding bolt to move freely throughand upon the extended armature or armature-lever, and therebyself-compensating for the varying greater or less motion incident to thearmature or armature-lever.

The advantages of my invention consist in greater simplicity and economyin constructiomand operating more efliciently-without further adjustingin wider range from feeble to strong currents and escapes, than anyrelay heretofore used or invented.

The diflerence between my invention and all others in construction andoperation, is, first, I convert the elasticity of armature or of thearmature-lever, which latter being firmly united or fastened to becomesa part of the armature, into an-eflieientand only spring for recoil,while all others indispensably use a spring or springs independent ofand outside of, and pressing against or pulling on the armature orarmature-lever for the same recoil; second, I use a. flexible joint inthe extended armature or armature-lever, whilst in all others theextended armature or armature-lever is without flexible joint; third, Iuse a shifting or sliding bolt, to move freely through and upon theextended armature or armature-lever, for operating the local circuit,and entirely dispense with the fixed platina point firmly united orfastened to extended armature or armature'lever, and which isindispcnsahly used by all others for the same purpose. In theaccompanying sheet of drawings Figure 1 is a perspective view of aportion of an electromagnetic-relay machine showing my invention.

Figure 2 is a vertical section of the same.

Figure 3 is a perspective view of a modification of fig. 1.

Similar letters in the accompanying drawings indicate correspondingparts.

To enable those skilled in the art to make and use my invention, I willdescribe its construction and operation, thus:-

Figures 1 and 2 show the extended armature A, on an axle or pivots atB,'with the flexible joint K, and sustaining the bolt L, which restsupon it, and is allowed to move freely through the opening at C, whilstoperating the local circuit at D, and the armature A impinging on orfixed against the edge of magnet-core E, or against any unyieidirigfulcrum at or near the point M, but not allowed to touch any partof thecore E, and thereby converting its own elasticity into a recoil-springat each break of the circuit.

Figure 3 shows the armature-lever G on au axle or pivots at B B, withthe flexible joint K, and sustaining the bolt L, which rests upon it,and is allowed to move freely through theopening at C whilst operatingthe local circuit at D, and the armature A impinging on or fixed againstthe edges of the magnet-.coresE and E at the points M and M, but notallowed to touch any other part of said cores E and E, or the nrmature Amay'i'mpin ge on.or b'e fixed against either of the said cores E or Exseparately, at or near the points M or M respectively, or'thearmature-lever G may impinge on or be fixcd- :t nearly between thepoints M and h thus converting the elasticity of the urmu armature-leverG into a recoil-spring at every break of the circuit.

Having thus described my invention, what I claim as new, and de 1- Thejointed armature or armature leverA or G,in combination or either ofthem,'substantially asherein shown and described.

2. I claim theflex'ihle joint in extended armature or alrmuture-levherein fully set forth and described.

3. I claim the shifting or sliding bolt in the extended arm the purposeherein fully set forth and described.

CHARLES DURANT. Witnesses:

WM. F. McNAMARA, ALEX. F. ROBERTS.

ninst any unyielding fulcrum, ture A, as well as that of the sire tosecure by Letters Patent, is with the magnet-cores E or E, or'E E or,substantially as and for the purpose ature or mature-lever,substantially as and for

